Initial typescript setup

src/cql-code-service.ts

@@ -21,9 +21,9 @@ export class CodeService implements TerminologyProvider {
     return this.valueSets[oid] ? Object.values(this.valueSets[oid]) : [];
   }
 
-  findValueSet(oid: string, version?: string): ValueSet | null | undefined {
+  findValueSet(oid: string, version?: string): ValueSet | null {
     if (version != null) {
-      return this.valueSets[oid] != null ? this.valueSets[oid][version] : undefined;
+      return this.valueSets[oid] != null ? this.valueSets[oid][version] : null;
     } else {
       const results = this.findValueSetsByOid(oid);
       if (results.length === 0) {

src/cql-patient.ts

@@ -1,7 +1,7 @@
 import * as DT from './datatypes/datatypes';
-import { RecordObject, DataProvider } from './types';
+import { DataProvider, PatientObject, RecordObject } from './types';
 
-export class Record {
+export class Record implements RecordObject {
   json: any;
   id: string;
 
@@ -94,11 +94,11 @@ export class Record {
   }
 }
 
-export class Patient extends Record {
+export class Patient extends Record implements PatientObject {
   name?: string;
   gender?: string;
   birthDate?: DT.DateTime | null;
-  records: RecordObject;
+  records: { [recordType: string]: Record[] };
 
   constructor(json: any) {
     super(json);